diff --git a/.gitattributes b/.gitattributes
index 83b022e5b0..416bf7d30e 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -969,6 +969,7 @@ components/codetools/tests/testcodecompletion.pas svneol=native#text/plain
 components/codetools/tests/testcompleteblock.pas svneol=native#text/plain
 components/codetools/tests/testcompreaderwriterpas.pas svneol=native#text/plain
 components/codetools/tests/testcth2pas.pas svneol=native#text/pascal
+components/codetools/tests/testctpas2js.pas svneol=native#text/plain
 components/codetools/tests/testctrangescan.pas svneol=native#text/plain
 components/codetools/tests/testctxmlfixfragments.pas svneol=native#text/pascal
 components/codetools/tests/testfinddeclaration.pas svneol=native#text/plain
diff --git a/components/codetools/tests/runtestscodetools.lpi b/components/codetools/tests/runtestscodetools.lpi
index 20ce51b278..a062e4cb98 100644
--- a/components/codetools/tests/runtestscodetools.lpi
+++ b/components/codetools/tests/runtestscodetools.lpi
@@ -38,7 +38,7 @@
         <PackageName Value="fpcunitconsolerunner"/>
       </Item2>
     </RequiredPackages>
-    <Units Count="14">
+    <Units Count="15">
       <Unit0>
         <Filename Value="runtestscodetools.lpr"/>
         <IsPartOfProject Value="True"/>
@@ -105,6 +105,11 @@
         <IsPartOfProject Value="True"/>
         <UnitName Value="TestIdentCompletion"/>
       </Unit13>
+      <Unit14>
+        <Filename Value="testctpas2js.pas"/>
+        <IsPartOfProject Value="True"/>
+        <UnitName Value="TestCTPas2js"/>
+      </Unit14>
     </Units>
   </ProjectOptions>
   <CompilerOptions>
diff --git a/components/codetools/tests/runtestscodetools.lpr b/components/codetools/tests/runtestscodetools.lpr
index 352d9d4d3f..dcca41c528 100644
--- a/components/codetools/tests/runtestscodetools.lpr
+++ b/components/codetools/tests/runtestscodetools.lpr
@@ -39,7 +39,7 @@ uses
   TestBasicCodetools, TestCTRangeScan, TestPascalParser, TestMethodJumpTool,
   TestStdCodetools, TestFindDeclaration, TestIdentCompletion, TestCompleteBlock,
   TestRefactoring, TestCodeCompletion, TestCompReaderWriterPas,
-  fdt_arrays;
+  fdt_arrays, TestCTPas2js;
 
 const
   ConfigFilename = 'codetools.config';
diff --git a/components/codetools/tests/testctpas2js.pas b/components/codetools/tests/testctpas2js.pas
new file mode 100644
index 0000000000..aa1ebcb53a
--- /dev/null
+++ b/components/codetools/tests/testctpas2js.pas
@@ -0,0 +1,102 @@
+{
+ Test all with:
+   ./runtests --format=plain --suite=TTestPas2js
+
+ Test specific with:
+   ./runtests --format=plain --suite=TestPas2js_ReadSettings
+}
+unit TestCTPas2js;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, CodeToolManager, FileProcs, DefineTemplates, LinkScanner,
+  LazLogger, LazFileUtils, LazUTF8, fpcunit, testregistry;
+
+type
+
+  { TCustomTestPas2js }
+
+  TCustomTestPas2js = class(TTestCase)
+  private
+    FAutoSearchPas2js: boolean;
+    FPas2jsFilename: string;
+  protected
+    procedure SetUp; override;
+    procedure TearDown; override;
+  public
+    constructor Create; override;
+    function FindPas2js: string;
+    property AutoSearchPas2js: boolean read FAutoSearchPas2js write FAutoSearchPas2js;
+    property Pas2jsFilename: string read FPas2jsFilename write FPas2jsFilename;
+  end;
+
+  { TTestPas2js }
+
+  TTestPas2js = class(TCustomTestPas2js)
+  published
+    procedure TestPas2js_ReadSettings;
+  end;
+
+implementation
+
+{ TCustomTestPas2js }
+
+procedure TCustomTestPas2js.SetUp;
+begin
+  inherited SetUp;
+  if (Pas2jsFilename='') and AutoSearchPas2js then begin
+    FPas2jsFilename:=FindPas2js;
+    AutoSearchPas2js:=false;
+  end;
+  //CodeToolBoss.CompilerDefinesCache;
+end;
+
+procedure TCustomTestPas2js.TearDown;
+begin
+  inherited TearDown;
+end;
+
+constructor TCustomTestPas2js.Create;
+begin
+  inherited Create;
+  FAutoSearchPas2js:=true;
+end;
+
+function TCustomTestPas2js.FindPas2js: string;
+var
+  ShortFilename: String;
+begin
+  Result:=GetEnvironmentVariable('PAS2JS');
+  if Result<>'' then begin
+    if not FileExistsUTF8(Result) then
+      Fail('Environment variable PAS2JS has non existing "'+Result+'"');
+    exit;
+  end;
+  ShortFilename:='pas2js'+ExeExt;
+  Result:=SearchFileInPath(ShortFilename,'',
+                           GetEnvironmentVariableUTF8('PATH'),PathSeparator,ctsfcDefault);
+end;
+
+{ TTestPas2js }
+
+procedure TTestPas2js.TestPas2js_ReadSettings;
+var
+  UnitSetCache: TFPCUnitSetCache;
+begin
+  if Pas2jsFilename='' then exit;
+
+  exit;
+  UnitSetCache:=CodeToolBoss.CompilerDefinesCache.FindUnitSet(Pas2jsFilename,
+    '','','','',true);
+  // parse compiler settings
+  UnitSetCache.Init;
+  AssertEquals('compiler kind',dbgs(pcPas2js),dbgs(UnitSetCache.GetCompilerKind));
+end;
+
+initialization
+  RegisterTest(TTestPas2js);
+end.
+